Robert Wagner was fighting for compensation from Columbia Studios for all revenues the film accumulated. During the Angels' television days, Wood and Wagner received 50% of all profits that Spelling-Goldberg Productions made. Now here's the tricky part: Spelling-Goldberg Productions sold all of their rights to Charlie Angel's to Sony Pictures Television years back. Whether Wagner was a part of this decision I'm not sure, and whether Wagner received any of the money that Spelling-Goldberg Productions sold it for is another gray area. Either way, due to the court's decision it leads one to believe that at the point of sale, Wagner was freed of any rights or obligations to Charlie's Angels. If that's the case, then it makes sense that Wagner would not receive any money from the success of the films, leaving him no reason to go after Columbia Pictures in the first place.
Here lies the conundrum. Why do people sell the rights to their work in the first place?! There must be something that I don't get. The biggest example of unreasonable sales is The Beatles selling the rights to their music to Michael Jackson. Yes, Charlie's Angels isn't The Beatles but if it's your work, your baby, then no amount of money should replace your artistic marriage to your creation. Therefore, don't sell your work unless you are certain you want nothing to do with it if someone resurrects it into another profitable success.